My car doesnt rev up to 3k now, since I opened and cheked the AFM's yesterday, didnt do anything or resoldered, but before that, I experienced the same but I can manage to rev it higher just pumping the gas always, but now, I cant rev it high even often pumping the gas, I also clean the fuel filter checked the plugs and coil pack which seems ok. Now I dont know what to check next. Please help.